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Register-ScheduledJob

JuanPablo Jofre|Last Updated: 12/17/2016
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3 Contributors

SYNOPSIS

Creates a new scheduled job.

SYNTAX

ScriptBlock (Default)

Register-ScheduledJob [-ScriptBlock] <ScriptBlock> [-Name] <String> [-Trigger <ScheduledJobTrigger[]>]
 [-InitializationScript <ScriptBlock>] [-RunAs32] [-Credential <PSCredential>]
 [-Authentication <AuthenticationMechanism>] [-ScheduledJobOption <ScheduledJobOptions>]
 [-ArgumentList <Object[]>] [-MaxResultCount <Int32>] [-WhatIf] [-Confirm] [<CommonParameters>]

FilePath

Register-ScheduledJob [-FilePath] <String> [-Name] <String> [-Trigger <ScheduledJobTrigger[]>]
 [-InitializationScript <ScriptBlock>] [-RunAs32] [-Credential <PSCredential>]
 [-Authentication <AuthenticationMechanism>] [-ScheduledJobOption <ScheduledJobOptions>]
 [-ArgumentList <Object[]>] [-MaxResultCount <Int32>] [-WhatIf] [-Confirm] [<CommonParameters>]

DESCRIPTION

The Register-ScheduledJob cmdlet creates scheduled jobs on the local computer.

A "scheduled job" is a Windows PowerShell background job that can be started automatically on a one-time or recurring schedule. Scheduled jobs are stored on disk and registered in Task Scheduler, so they can be managed in Task Scheduler or by using the Scheduled Job cmdlets in Windows PowerShell.

When a scheduled job starts, it creates an "instance" of the scheduled job. Scheduled job instances are identical to Windows PowerShell background jobs, except that the results are saved on disk. Use the Job cmdlets, such as Start-Job, Get-Job, and Receive-Job to start, view, and get the results of the job instances.

Use Register-ScheduledJob to create a new scheduled job. To specify the commands that the scheduled job runs, use the ScriptBlock parameter; to specify a script that the job runs, use the FilePath parameter.

Windows PowerShell scheduled jobs use the same job triggers and job options that Task Scheduler uses for scheduled tasks.

The Trigger parameter of Register-ScheduledJob adds one or more job triggers that start the job. The Trigger parameter is optional, so you can add triggers when you create the scheduled job, add job triggers later, use the Start-Job cmdlet to start the job immediately at any time, or save the untriggered scheduled job as a template for other jobs.

The Options parameter lets you customize the options settings for the scheduled job. The Options parameter is also optional, so you can set job options when you create the scheduled job or change them at any time. Because job option settings can prevent the scheduled job from running, review the job options and set them carefully.

Register-ScheduledJob is one of a collection of job scheduling cmdlets in the PSScheduledJob module that is included in Windows PowerShell.

For more information about Scheduled Jobs, see the About topics in the PSScheduledJob module. Import the PSScheduledJob module and then type: Get-Help about_Scheduled* or see about_Scheduled_Jobs.

This cmdlet is introduced in Windows PowerShell 3.0.

EXAMPLES

Example 1: Create a scheduled job

PS C:\> Register-ScheduledJob -Name Archive-Scripts -ScriptBlock { dir $home\*.ps1 -Recurse | Copy-Item -Destination \\Server\Share\PSScriptArchive }

This command creates the Archive-Scripts scheduled job. The ScriptBlock parameter value contains a command that searches the $home directory recursively for .ps1 files and copies them to a directory in a file share.

Because the scheduled job does not contain a trigger, it is not started automatically. You can use add job triggers later, use the Start-Job cmdlet to start the job on demand, or use the scheduled job as a template for other scheduled jobs.

Example 2: Create a scheduled job with triggers and custom options

The first command uses the New-ScheduledJobOption cmdlet to create a job option object, which it saves in the $o parameter. The options start the scheduled job even if the computer is not idle, wake the computer to run the job, if necessary, and allows multiple instances of the job to run in a series.
PS C:\> $o = New-ScheduledJobOption -WakeToRun -StartIfNotIdle -MultipleInstancesPolicy Queue


The second command uses the New-JobTrigger cmdlet to create job trigger that starts a job every other Monday at 9:00 p.m.
PS C:\> $t = New-JobTrigger -Weekly -At "9:00 PM" -DaysOfWeek Monday -WeeksInterval 2

This command creates the UpdateVersion scheduled job, which runs the UpdateVersion.ps1 script every Monday at 9:00 p.m. The command uses the **FilePath** parameter to specify the script that the job runs. It uses the **Trigger** parameter to specify the job triggers in the $t variable and the **ScheduledJobOption** parameter to specify the option object in the $o variable.
PS C:\> Register-ScheduledJob -Name UpdateVersion -FilePath \\Srv01\Scripts\UpdateVersion.ps1 -Trigger $t -ScheduledJobOption $o

This example shows how to create a scheduled job that has a job trigger and custom job options.

Example 3: Use hash tables to specify a trigger and job options

PS C:\> Register-ScheduledJob -FilePath \\Srv01\Scripts\Update-Version.ps1 -Trigger @{Frequency=Weekly; At="9:00PM"; DaysOfWeek="Monday"; Interval=2} -ScheduledJobOption @{WakeToRun; StartIfNotIdle; MultipleInstancesPolicy="Queue"}

This command is has the same effect as the command in Example 2. It creates a scheduled job, but it uses hash tables to specify the values of the Trigger and ScheduledJobOption parameters.

Example 4: Create scheduled jobs on remote computers

PS C:\> Invoke-Command -ComputerName (Get-Content Servers.txt) -ScriptBlock {Register-ScheduledJob -Name Get-EnergyData -FilePath "\\Srv01\Scripts\Get-EnergyData.ps1" -ScheduledJobOption $o -Trigger $t } -Credential $cred

This command creates the EnergyData scheduled job on multiple remote computers. The scheduled job runs a script that gathers raw data and saves it in a running log. The scheduled jobs are created on the remote computer, run on the remote computer, and store their results on the remote computer.

The command uses the Invoke-Command cmdlet to run a Register-ScheduledJob command on the computers in the Servers.txt file. The Invoke-Command command uses the Credential parameter to provider the credentials of a user who has permission to create scheduled jobs on the computers in the Servers.txt file.

The Register-ScheduledJob command creates a scheduled job on the remote computer that runs the EnergyData.ps1 script on the scheduled specified by the job trigger in the $t variable. The script is located on a file server that is available to all participating computers.

Example 5: Create a scheduled job that runs a script on remote computers

PS C:\> Register-ScheduledJob -Name CollectEnergyData -Trigger $t -MaxResultCount 99 -ScriptBlock { Invoke-Command -AsJob -ComputerName (Servers.txt) -FilePath "\\Srv01\Scripts\Get-EnergyData.ps1" -Credential $Admin -Authentication CredSSP }

This command uses the Register-ScheduledJob cmdlet to create the CollectEnergyData scheduled job on the local computer. The command uses the Trigger parameter to specify the job schedule and the MaxResultCount parameter to increase the number of saved results to 99.

The CollectEnergyData job uses the Invoke-Command cmdlet to run the EnergyData.ps1 script as a background on the computers listed in the Servers.txt file. The Invoke-Command command uses the AsJob parameter to create the background job object on the local computer , even though the Energydata.ps1 script runs on the remote computers. The command uses the Credential parameter to specify a user account that has permission to run scripts on the remote computers and the Authentication parameter with a value of CredSSP to allow delegated credentials.

PARAMETERS

-ArgumentList

Specifies values for the parameters of the script that is specified by the FilePath parameter or for the command that is specified by the ScriptBlock parameter.

Type: Object[]
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-Authentication

Specifies the mechanism that is used to authenticate the user's credentials. Valid values are Default, Basic, Credssp, Digest, Kerberos, Negotiate, and NegotiateWithImplicitCredential. The default value is Default. For information about the values of this parameter, see the description of the System.Management.Automation.Runspaces.AuthenticationMechanism enumeration in MSDN.

CAUTION: Credential Security Service Provider (CredSSP) authentication, in which the user's credentials are passed to a remote computer to be authenticated, is designed for commands that require authentication on more than one resource, such as accessing a remote network share. This mechanism increases the security risk of the remote operation. If the remote computer is compromised, the credentials that are passed to it can be used to control the network session.

Type: AuthenticationMechanism
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: Default
Accept pipeline input: False
Accept wildcard characters: False

-Credential

Specifies a user account that has permission to run the scheduled job. The default is the current user.

Type a user name, such as "User01" or "Domain01\User01", or enter a PSCredential object, such as one from theGet-Credential cmdlet. If you enter only a user name, you will be prompted for a password.

Type: PSCredential
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: Current user
Accept pipeline input: False
Accept wildcard characters: False

-FilePath

Specifies a script that the scheduled job runs. Enter the path to a .ps1 file on the local computer. To specify default values for the script parameters, use the ArgumentList parameter. Every Register-ScheduledJob command must use either the ScriptBlock or FilePath parameters.

Type: String
Parameter Sets: FilePath
Aliases: 

Required: True
Position: 2
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-InitializationScript

Specifies the fully qualified path to a Windows PowerShell script (.ps1). The initialization script runs in the session that is created for the background job before the commands that are specified by the ScriptBlock parameter or the script that is specified by the FilePath parameter . You can use the initialization script to configure the session, such as adding files, functions, or aliases, creating directories, or checking for prerequisites.

To specify a script that runs the primary job commands, use the FilePath parameter.

If the initialization script generates an error (even a non-terminating error), the current instance of the scheduled job does not run and its status is "Failed."

Type: ScriptBlock
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-MaxResultCount

Specifies how many job result entries are maintained for the scheduled job. The default value is 32.

Windows PowerShell saves the execution history and results of each triggered instance of the scheduled job on disk. The value of this parameter determines the number of job instance results that are saved for this scheduled job. When the number of job instance results exceeds this value, Windows PowerShell deletes the results of the oldest job instance to make room for the results of the newest job instance.

The job execution history and job results are saved in the $home\AppData\Local\Microsoft\Windows\PowerShell\ScheduledJobs\<JobName>\Output\<Timestamp> directories on the computer on which the job is created. To see the execution history, use the Get-Job cmdlet. To get the job results, use the Receive-Job cmdlet.

The MaxResultCount parameter sets the value of the ExecutionHistoryLength property of the scheduled job.

To delete the current execution history and job results, use the ClearExecutionHistory parameter of the Set-ScheduledJob cmdlet.

Type: Int32
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: 32
Accept pipeline input: False
Accept wildcard characters: False

-Name

Specifies a name for the scheduled job. The name is also used for all started instances of the scheduled job. The name must be unique on the computer. This parameter is mandatory.

Type: String
Parameter Sets: (All)
Aliases: 

Required: True
Position: 1
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-RunAs32

Runs the scheduled job in a 32-bit process.

Type: SwitchParameter
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: False
Accept pipeline input: False
Accept wildcard characters: False

-ScheduledJobOption

Sets options for the scheduled job. Enter a ScheduledJobOptions object, such as one that you create by using the New-ScheduledJobOption cmdlet, or a hash table value.

You can set options for a scheduled job when you register the schedule job or use the Set-ScheduledJobOption orSet-ScheduledJob cmdlets to change the options.

Many of the options and their default values determine whether and when a scheduled job runs. Be sure to review these options before scheduling a job. For a description of the scheduled job options, including the default values, see New-ScheduledJobOption.

To submit a hash table, use the following keys. In the following hash table, the keys are shown with their default values.

@{StartIfOnBattery=$False; StopIfGoingOnBattery=$True; WakeToRun=$False; StartIfNotIdle=$False; IdleDuration="00:10:00"; IdleTimeout="01:00:00"; StopIfGoingOffIdle=$True; RestartOnIdleResume=$False; ShowInTaskScheduler=$True; RunElevated=$False; RunWithoutNetwork=$False; DoNotAllowDemandStart=$False; MultipleInstancePolicy=IgnoreNew}

Type: ScheduledJobOptions
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScriptBlock

Specifies the commands that the scheduled job runs. Enclose the commands in braces ( { } ) to create a script block. To specify default values for command parameters, use the ArgumentList parameter.

Every Register-ScheduledJob command must use either the ScriptBlock or FilePath parameters.

Type: ScriptBlock
Parameter Sets: ScriptBlock
Aliases: 

Required: True
Position: 2
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-Trigger

Specifies the triggers for the scheduled job. Enter one or more ScheduledJobTrigger objects, such as the objects that the New-JobTrigger cmdlet returns, or a hash table of job trigger keys and values.

A "job trigger" starts the schedule job. The trigger can specify a one-time or recurring scheduled or an event, such as when a user logs on or Windows starts.

The Trigger parameter is optional. You can add a trigger when you create the scheduled job, use the Add-JobTrigger, Set-JobTrigger, or Set-ScheduledJob cmdlets to add or change job triggers later, or use the Start-Job cmdlet to start the scheduled job immediately. You can also create and maintain a scheduled job without a trigger that is used as a template.

To submit a hash table, use the following keys.

@{Frequency="Once" (or Daily, Weekly, AtStartup, AtLogon);At="3am" (or any valid time string); DaysOfWeek="Monday", "Wednesday" (or any combination of day names); Interval=2 (or any valid frequency interval); RandomDelay="30minutes" (or any valid timespan string); User="Domain1\User01 (or any valid user; used only with the AtLogon frequency value) }

Type: ScheduledJobTrigger[]
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-Confirm

Prompts you for confirmation before running the cmdlet.

Type: SwitchParameter
Parameter Sets: (All)
Aliases: cf

Required: False
Position: Named
Default value: False
Accept pipeline input: False
Accept wildcard characters: False

-WhatIf

Shows what would happen if the cmdlet runs. The cmdlet is not run.

Type: SwitchParameter
Parameter Sets: (All)
Aliases: wi

Required: False
Position: Named
Default value: False
Accept pipeline input: False
Accept wildcard characters: False

CommonParameters

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216).

INPUTS

None

You cannot pipe input to this cmdlet.

OUTPUTS

Microsoft.PowerShell.ScheduledJob.ScheduledJobDefinition

NOTES

  • Each scheduled job is saved in a subdirectory of the $home\AppData\Local\Microsoft\Windows\PowerShell\ScheduledJobs directory on the local computer. The subdirectory is named for the scheduled job and contains an XML file for the scheduled job and records of its execution history. For more information about scheduled jobs on disk, see about_Scheduled_Jobs_Advanced.
  • Scheduled jobs that you create in Windows PowerShell appear in Task Scheduler in the Task Scheduler Library\Microsoft\Windows\PowerShell\ScheduledJobs folder. You can use Task Scheduler to view and edit the scheduled job.
  • You can use Task Scheduler, the SchTasks.exe command-line tool, and the Task Scheduler cmdlets to manage scheduled jobs that you create with the Scheduled Job cmdlets. However, you cannot use the Scheduled Job cmdlets to manage tasks that you create in Task Scheduler.
  • If a scheduled job command fails, Windows PowerShell returns an error message. However, if the job fails when Task Scheduler tries to run it, the error is not available to Windows PowerShell.

    If a scheduled job does not run, use the following methods to find the reason.

  • Verify that the job trigger is set properly. -- Verify that the conditions set in the job options are satisfied.

  • Verify that the user account under which the job runs has permission to run the commands or scripts in the job. -- Check the Task Scheduler history for errors
  • Check the Task Scheduler event log for errors.

For more information, see about_Scheduled_Jobs_Troubleshooting.

about_Scheduled_Jobs

Add-JobTrigger

Disable-JobTrigger

Disable-ScheduledJob

Enable-JobTrigger

Enable-ScheduledJob

Get-JobTrigger

Get-ScheduledJob

Get-ScheduledJobOption

New-JobTrigger

New-ScheduledJobOption

Register-ScheduledJob

Remove-JobTrigger

Set-JobTrigger

Set-ScheduledJob

Set-ScheduledJobOption

Unregister-ScheduledJob

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